GPT-5.1 Medium vs Nova Micro
Comparing GPT-5.1 Medium and Nova Micro across benchmarks, pricing, and capabilities.
OpenAI · Amazon · Updated for 2026
Which is better?
GPT-5.1 Medium and Nova Micro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Nova Micro is roughly 59.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.1 Medium also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose GPT-5.1 Medium
- you process long inputs — it offers a 400,000 token context window
- you want the most recent training data — it shipped Nov 2025
Choose Nova Micro
- cost matters — it's about 59.8x cheaper per token
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.1 Medium and Nova Microdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5.1 Medium ($1.25/1M tokens) is 41.7x more expensive than Nova Micro ($0.03/1M tokens).
For output processing, GPT-5.1 Medium ($10.00/1M tokens) is 71.4x more expensive than Nova Micro ($0.14/1M tokens).
In conclusion, GPT-5.1 Medium is more expensive than Nova Micro.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.1 Medium accepts 400,000 input tokens compared to Nova Micro's 128,000 tokens. Both models can generate responses up to 128,000 tokens.
Input Capabilities
Supported data types and modalities
GPT-5.1 Medium supports multimodal inputs, whereas Nova Micro does not.
GPT-5.1 Medium can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.1 Medium
Nova Micro
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.1 Medium was released on 2025-11-12, while Nova Micro was released on 2024-11-20.
GPT-5.1 Medium is 12 months newer than Nova Micro.
Nov 12, 2025
9 months ago
11mo newerNov 20, 2024
1.8 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-5.1 Medium is available from OpenAI. Nova Micro is available from Bedrock.
GPT-5.1 Medium
Nova Micro
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-5.1 Medium and Nova Micro side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.1 Medium vs Nova Micro.